cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A063670 Positions of nonzero coefficients in cyclotomic polynomial Phi_n(x), converted from binary to decimal.

Table of values

n a(n)
0 2
1 3
2 3
3 7
4 5
5 31
6 7
7 127
8 17
9 73
10 31
11 2047
12 21
13 8191
14 127
15 443
16 257
17 131071
18 73
19 524287
20 341
21 7003
22 2047
23 8388607
24 273
25 1082401
26 8191
27 262657
28 5461
29 536870911
30 443
31 2147483647
32 65537
33 1797851
34 131071
35 26181091
36 4161
37 137438953471
38 524287

List of values

[2, 3, 3, 7, 5, 31, 7, 127, 17, 73, 31, 2047, 21, 8191, 127, 443, 257, 131071, 73, 524287, 341, 7003, 2047, 8388607, 273, 1082401, 8191, 262657, 5461, 536870911, 443, 2147483647, 65537, 1797851, 131071, 26181091, 4161, 137438953471, 524287]